For half a century, Green Roofs are essential in stormwater management on structures in Germany. Most of these historical Green Roofs still exist and more importantly their smart stormwater detention and retention capability still goes beyond the trendy one-size-fits-all systems with plant mono cultures.
Natural Water Cycle
Earth's water is always in movement, and the natural water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above, and below the surface of the Earth.
Water is always changing states between liquid, vapor, and ice, with these processes happening in the blink of an eye and over millions of years.
With human interference - things will change...
Urban Water Cycle
The urban water cycle is ‘man made’ created to provide drinking water to homes and businesses, to remove wastewater and sewage, and redirect stormwater away from homes and businesses and into our waterways.
Meanwhile this 'man made' urban water cycle created with grey infrastructure is giving us serious problems.
Impervious sidewalks, streets, and buildings cover the soil, preventing infiltration and massively interrupting the natural water cycle. The consequences are soil erosion, destructive floods, water pollution, harmful algal blooms, lack of groundwater, and billions of dollars in damage every year.
Stormwater retention is the holding-back of water without releasing it.
For example, a bucket will retain all the water poured into it to the top rim of the bucket. If you pour more water in the bucket, it will overflow in the same amount as is poured in.
Ideally, on a Green Roof the water is retained in porous aggregates that mimic natural soil profiles that are ideal for resilient growth of the plants.
The plants require a suitable Air-to-Water ratio in order to utilize nutrients that will generate growth and sequester carbon dioxide.
Moisture release from the porous aggregates provides evaporative cooling of the Green Roof plants and consequently heat island effect is reduced as well.
Stormwater detention is detaining stormwater for a limited and/or a defined time.
For example, if you have a small hole in the bottom of a bucket that is full of water, the water will slowly flow out through the hole. If additional water is poured into the bucket at a greater amount then is flowing through the hole, then the water will also overflow from the top.
Klima roof uses a composition of natural mineral aggregates that delay runoff for up to 10 hours.
Additionally, with a Smart Drain the runoff will be contolled by the weather App and the demand of the plants.
Stormwater Utilization and Smart Flow Control
We face a global challenge to responsibly use and protect our finite supply of freshwater, yet all too often we overlook ways to guard and extend this precious resource.
The ever increasing world population is outstripping nature’s ability to deliver clean water. We must seek out and implement smart practices that provide sustainable solutions for the world's increasing clean water needs.
Klima roof is the first true Green/Blue Roof system utilizing water from the built-in water reservoir. The subsurface grid technology allows redistribution of water to areas within the system where it is needed, or where the water demand of the vegetation is higher. The plants control the function, combined with actual weather data and an accurate forecast.
Optionally, klima roof's water reservoir can be recharged with the building’s grey water, eliminating the use of freshwater.
The combination of the mineral aggregates and the vegetation act as one of nature’s most sophisticated purification tools.
klima roof's modern Green Roof and Blue Roof technologies are based on natural water cycle systems, easily tailored for each project and scientifically proven for over 40 years.
There is no need to reinvent the wheel when you have nature as a guide.
Some of us are data collectors, others are focused on the vegetation and soil biology - klima roof can provide the best of both worlds. We don't sell a one-size-fits-all system, optimized for only one aspect and disregarding the other essential needs of the living vegetation. Healthy, thriving, and resilient green vegetation is what counts the most on a Green Roof.